PHPでfizzbuzz問題にトライした話 ref: http://qiita.com/boscoworks/items/215a0804228bf4514588

file0.txt

<?php

for($num = 1; $num <= 100; $num++) {
    $flag = false;
    $sum = $num;
    while($sum > 9) {
        $sum = array_sum(array_map('intval', str_split((string)$sum, 1)));
    }
    if(in_array($sum, array(3, 6, 9), true)) { $flag = true; echo 'fizz'; }
    if(in_array(substr((string)$num, -1), array('0', '5'), true)) { $flag = true; echo 'buzz'; }
    if(!$flag) echo $num;
    echo "\n";
}

fizzbuzz.php

<?php

for($num = 1; $num <= 100; $num++) {
    $flag = false;
    $sum = $num;
    while($sum > 9) {
        $sum = array_sum(array_map('intval', str_split((string)$sum, 1)));
    }
    if(in_array($sum, array(3, 6, 9), true)) { $flag = true; echo 'fizz'; }
    if(in_array(substr((string)$num, -1), array('0', '5'), true)) { $flag = true; echo 'buzz'; }
    if(!$flag) echo $num;
    echo "\n";
}